Casement window fastener



Patented Mar. 14, 1939 PATENT OFFICE CASEMENT WINDOW FASTENER Foster John Thompson, Oak Park, Ill.

Application December 13, 1937, Serial No. 179,556

3 Claims.

The novel and improved invention portrayed in the accompanying illustrative drawings is devoted to the development and perfection of a manually manipulated mechanical latch type retainer expressly designed to fasten in closed position single or double ventilated casement windows or equivalent closures.

The preferred construction was conceived and expressly constructed-for horizontally swingable closures operable on vertical axes and will be found especially useful when utilized on casement window constructions embodying auxiliary storm windows and so-called full length screens.

Briefly, I have found it expedient and practicable to simply incorporate a single control multiple headed double engaging latch member in the central frame bar of the frame structure supporting the companion casement windows, the control or handle means being mounted in the lower sill portion of the frame whereby to render it readily available, to permit the windows to swing clear of it and to obviate mutilating the windows and screens to provide for its accommodation.

ther features and advantages will become more readily apparent from the following description and accompanying drawings.

In the drawings, wherein like numerals are employed to designate like parts throughout the views:

Figure 1 is a fragmentary view showing the twin-style casement window and fastener means associated therewith, as developed in accordance with the present invention.

Figure 2 is an enlarged fragmentary horizontal sectional view detailing the retainer and its method of mounting, the section being on the line 2--2 of Figure 1.

Figure 3 is an enlarged vertical sectional view, with portions in elevation, taken approximately on the plane of the line 33 of Figure 2.

Figure 4 is a fragmentary section of a vertical character taken approximately on the plane of the line 4-4 of Figure 3.

Figures 5 and 6 are isometric or perspective views of certain of the details.

Referring now to the drawings by detailing reference numerals, it will be observed that the relatively stationary metal frame is denoted by the numeral 1. The casement windows are distinguished by the numerals 8 and 9. These are shown cooperating with the lower frame member Ill and the centrally disposed vertical parting beam 1 I. As brought out to advantage in Figure 2, the beam is somewhat I-shaped in cross sectional form and one flange l2 thereof serves as an abutment against which the coacting flanges on the swingable edges of the windows cooperate. The web portion 53, as shown in Figures 2 and 3, is provided with what may be called an elongated 5 adapter opening or slot l4, this to accommodate the guide and adapter block or fixture l5. As shown in Figure 5 this part is shouldered as at 16 to engage in the slot and it is held in position by a screw or equivalent fastening ll. The block is bifurcated and the substantially parallel furcations it serve to accommodate the wedgeshaped head l8 of the T-shaped latch member 19. The cylindrical stem portion 20 is mounted for reciprocation in the vertical bore in the guide block. The ends of the head project at right angles to the web l3 and are extended sufficiently far to coact with the keeper means on thecomplemental casement windows 8 and 9 (see Figures 3 and 4). Incidentally, the keeper plates 22 are provided with adjustable attaching means comprising slots 23 to accommodate the fastening screws 24. As observed in Figure 4, opposed parallel segmental lugs 25 formed on the longitudinal edges of the plates 22 provide adequate detents or keepers for the projecting end portions of the latch member IS. The curvature of the lugs and the wedge-shaped formation of the latch insures relatively tight coaction of the parts.

The vertically disposed operating rod 26 has its threaded upper end tapped into a screw threaded socket in the stem 2|]. The lower end is pivotally attached as at 21 to the fork on a rocker arm 28. The rocker arm is on the crank shaft, the crank shaft being mounted for oscillation in a suitable accommodation fixture or bracket 29 as brought out to advantage in Figure 2. This bracket is mounted wholly within the limits of the lowerframe member Ill. On the outer end of the rocker shaft 30 is a suitable 4o finger grip or knob 3|.

It is obvious that by grasping the knob 3| and oscillating the rocker or crank shaft 30, this will serve to actuate the operating rod 26. The rod 26 will in turn lift and lower the latch element 18. Consequently, the windows may be safely and securely maintained in closed position or simultaneously released to be swung to open position clear of the control means mounted in the lower frame member ID.

It is thought that the description taken in connection with the drawings will enable a clear understanding of the invention to be had. Therefore, a more lengthy description is thought unnecessary. 66

While the preferred embodiment of the invention has been shown and described, it is to be understood that minor changes coming within the field of invention claimed may be resorted to if desired.

I claim:

1. As a component part of a structural assemblage of the class described, a bearing bracket, a rocker shaft mounted for oscillation therein and including a rocker arm, an operating rod attached to said rocker arm, a guide block including a guide bore and spaced furcations, a T- shaped latch member the head portion thereof operating between said furcations, the stem portion extending slidably through said bore, said operating rod being connected 'to the stem portion of said latch member.

2. For use with a frame having horizontal and vertical members and a centrally disposed vertical parting beam, said frame being adapted to accommodate a pair of complemental hingedly mounted windows whose adjacent inner ends are swingable into cooperating relationship with respect to said vertical parting'beam, a window fastener comprising a bearing bracket mounted in the lower horizontal member of said frame, a rocker shaft mounted for oscillation in the bearing bracket and including a rocker arm and a hand controlled actuating knob, a guide block in-, cluding a guide bore and spaced furcations, a T- shaped latch member, the head portion thereof operating between said furcations, the stem portion extending slidably through said bore, an operating connection between said rocker arm and stem portion, and said head adapted to cooperate with a pair of window carried keeper plates having spaced lugs to accommodate the end portions of said head.

3. As a new article of manufacture and a componeni part of a structural assemblage of the class described, a bearing bracket adapted for attachment to a Window accommodation frame, a rocker shaft mounted for oscillation in said bearing bracket and provided at one end with a motion transmitting rocker arm, a hand controlled actuating knob connected to the opposite end of said rocker shaft, a guide block adapted to be mounted on the frame and provided with a guide bore and upstanding spaced furcations, a latch member positioned and operating between said furcations, and an operating connection between the latch member and said rocker arm, said operating connection being slidably mounted in said bore.

FOSTER JOHN THOMPSON. 

